摘要
以微米级α-Al_2O_3、陶瓷水体分散剂为主要原料,以La_2O_3-水洗高岭土为烧结助剂,采用冰模板法制备了一种具有高孔隙率和较高抗压强度的氧化铝/高岭土复合定向多孔陶瓷。研究了不同添加量的La_2O_3对多孔陶瓷的显气孔率、体积密度、抗压强度和微观形貌的影响。结果表明:添加适量的稀土La_2O_3能降低多孔陶瓷烧结温度、提高体积密度和抗压强度。通过高能机械球磨法添加La2O3,在1350℃烧结制备的多孔材料样品显气孔率为82%,样品的抗压强度达到10 MPa以上。当La_2O_3加入量达到3%时,可使多孔陶瓷抗压强度提高到15.2 MPa,较不掺加La2O3提高了约53%。
Choosing micron grade α-Al_2O_3 and ceramic water dispersant as the raw materials,using La_2O_3-kaolin as additives,a kind of high appending porosity and high compressive strength of Al_2O_3/ kaolin composite directional porous ceramic was prepared by ice template method. The effects of La_2O_3 content on the appending porosity,bulk density,the compressive strength and microstructure were investigated. The results show that bulk density and the compressive strength of sample are improved while sintering temperature decrease by adding appropriate content of La_2O_3. The appending porosity of porous material is82% while the compressive strength of sample reaches more than 10 MPa at 1350 ℃ by using high-energy ball milling method to add La_2O_3. When the content of La_2O_3 is 3wt%,the compressive strength of porous ceramic reaches at 15. 2 MPa,which can be increased by about 53%,compared with the pure sample.
出处
《人工晶体学报》
EI
CAS
CSCD
北大核心
2016年第3期803-807,共5页
Journal of Synthetic Crystals
基金
广东省自然科学基金(2014A030313479)
汕头市科技计划(22)资助项目
